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The GTR1400/concours14(coughcough) has dual throttle shafts with tps on each shaft which would indicate that there are primary and secondary throttle blades.
The rumor is that the intake cam is driven by a chain form the crank. The exhaust cam is driven by a chain form the intake cam. The sprocket on the intake cam has an advancer built into it which will advance/retard the exhaust cam timing. How that is controlled is open to discussion but it appears that on the right hand side of the cylinder head there is an actuator that is mot likely driven by the ecm. At this point this is all conjecture, time will tell how close we are guessing.
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Ol' Wrench Head of the Booze Junkies MC
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